In the impression of most people, the invisible ink marks on the playing cards are made by printer. Because they can see the marked cards printer for sale on the menu bar. But today, we want to give y...

IR lens is also called infrared lens, which uses a special optical glass material, and the latest optical design methods to eliminate the visible and infrared light focal plane offset, to let you see ...

People will decorate their home and shop with wall paintings to make people have the visual enjoyment, and many poker club and private casino as well. And the person who has the desire for something, ...